Every human's greatest fear is that we are not enough and as a result that we won't be loved. We are born this way. It is human psychology 101. Without love a human baby dies. Other animals won't. So this is not some artificial construct that develops over time--it is hardwired into us at our most fundamental level, via our autonomic nervous system.
This swapping back and forth between the horrific and the mundane or even jolly, is not uncharacteristic of common ways of ways coping with chronic trauma: the black humour of a doctors' mess, for example. Humour is known to be an effective coping strategy, associated with a lower risk of post traumatic stress disorder.
What you wear affects you psychologically. It can profoundly alter your mood. It also influences how others respond to you. And the visual illusion created by cut and fabric dramatically changes the appearance of your body. Your clothes can affect your job prospects, your love life and even your self-image.
The internet turned out to be the most democratic space which can be accessed by everyone who can use a bit of tech to better their lives and knowledge base... Suicides, depression, anxiety, and humiliation - all these and more are associated with the internet, what with some people using it to vent their sadism out.
The development of effective and evidence-based psychological treatments is one of the major triumphs of the last decades. And based on this triumph, some folks say we don't really need to know why they work, we just need more of them. But that is jumping the gun on policy, and may just further embed the status quo into our management of mental health problems.